Investigation the connection between the intermediate gamma-ray bursts and X-ray flashes

TL;DR

This study explores the relationship between intermediate gamma-ray bursts and X-ray flashes, finding mostly similar characteristics except for the BAT photon index, which is influenced by their definitions.

Contribution

It provides a comparative analysis of the global parameters of intermediate gamma-ray bursts and X-ray flashes, highlighting their similarities and differences.

Findings

No significant difference in most parameters.

The BAT photon index differs due to definitions.

Supports the idea of a connection between the two phenomena.

Abstract

Gamma-ray bursts can be divided into three groups: short-, intermediate and long-duration bursts. While the progenitors of the short and long ones are relatively known, the progenitor objects of the intermediate-duration bursts are generally unknown, however, recent statistical studies suggest, that they should be related to the long-duration bursts. In this work we investigate whether there is a differ- ence between the global parameters of the X-ray flashes and intermediate-duration group of gamma-ray bursts. The statistical tests do not show any significant discrepancy regarding most of the parameters, except the BAT photon index, which is only a consequence of the defintion of the X-ray flashes.